A study in which a researcher takes active control of an independent variable,manipulates it,and observes its effect on a dependent variable is called a(n):

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An experiment involves actively controlling and manipulating an independent variable to observe its effect on a dependent variable. Correlational studies do not involve manipulating variables, longitudinal studies observe changes over time but may not involve active manipulation of variables, and quasi-experiments involve manipulation of an independent variable but may not have the level of control seen in a traditional experiment.

A Study in Which a Researcher Takes Active Control of an Independent